Vertical Module Spring-powered mechanism that assists in carrying your SliderPLUS PRO setup, allowing the Motor Module to move the SliderPLUS PRO effortlessly at any incline. All Mechanical Vertical Module compensates for gravity, keeping the system weightless at any angle with the help of constant force springs. No need for extra batteries! Heavy Lifter Despite weighing about just 1 kg, Vertical Module can lift SliderPLUS PRO + Motor Module + HeadPLUS and a camera even at absolute vertical motion. NOTE: The range of motion under full load may fall below the full range of motion of the slider, but even under full load, you are guaranteed to get at least 60 cm of vertical movement. Fast & Simple Setup Attaches Under SliderPLUS PRO Models - Vertical Module is designed to be compatible with SliderPLUS PRO models as well as SliderPLUS models equipped with the PRO Fit Module. Easily Counterbalance Your Equipment - The module offers 5 levels of spring tension to accommodate different equipment weight, easily adjustable by attaching the necessary number of rings to SliderPLUS's side (Side piece included with Vertical Module). Adjust Slide Angle with the Turn of a Knob - Vertical Module utilizes an axis knob that allows for quick angle adjustments on the go.